C / C++ / MFC

I'm trying to use the grid control in a CFormView-based class, by inserting a custom control in the dialog. My application fails with "Failed to create empty document" message at startup, the trace information from a debug run is as follows:

WndProc: hwnd=0x4C03D6, msg = WM_GETMINMAXINFO (0x0000, 0x0012F9FC)
WndProc: hwnd=0x4C03D6, msg = WM_NCCREATE (0x0000, 0x0012F9D0)
WndProc: hwnd=0x4C03D6, msg = WM_NCCALCSIZE (0x0000, 0x0012FA1C)
WndProc: hwnd=0x4C03D6, msg = WM_CREATE (0x0000, 0x0012F9BC)
WndProc: hwnd=0x2D02FE, msg = WM_NCCREATE (0x0000, 0x0012F394)
WndProc: hwnd=0x2D02FE, msg = WM_NCCALCSIZE (0x0000, 0x0012F3C4)
WndProc: hwnd=0x2D02FE, msg = WM_CREATE (0x0000, 0x0012F394)
WndProc: hwnd=0x2D02FE, msg = WM_SIZE (0x0000, 0x014501E0)
WndProc: hwnd=0x4C03D6, msg = 0x0368 (0x0000, 0x0012F0E4)
WndProc: hwnd=0x2D02FE, msg = WM_MOVE (0x0000, 0x00000000)
WndProc: hwnd=0x4C03D6, msg = WM_PARENTNOTIFY (0x0001, 0x002D02FE)
WndProc: hwnd=0x2D02FE, msg = WM_SETFONT (0x500A043F, 0x00000000)
WndProc: hwnd=0x4C03D6, msg = WM_PARENTNOTIFY (0x0002, 0x002D02FE)
WndProc: hwnd=0x2D02FE, msg = WM_DESTROY (0x0000, 0x00000000)
WndProc: hwnd=0x2D02FE, msg = WM_NCDESTROY (0x0000, 0x00000000)
Warning: could not create view for frame.
Failed to create client pane/view for frame.
WndProc: hwnd=0x4C03D6, msg = WM_DESTROY (0x0000, 0x00000000)
WndProc: hwnd=0x4C03D6, msg = WM_NCDESTROY (0x0000, 0x00000000)
Warning: Window creation failed: GetLastError returns 0x00000000
Warning: failed to create CFrameWnd.
Warning: CDocTemplate couldn't create a frame.
The thread 0x4C4 has exited with code 0 (0x0).
The program 'D:\TEMP\gctest\Debug\gctest.exe' has exited with code 0 (0x0).

The first warning is caused by ::CreateDialogIndirect() failing when the CMainFrame is being created. Then everything else fails because there is no main window.

Any idea why the window creation fails? Is some additional initialization needed?

  // open a socket 
  cout << "Creating a socket..." << endl ; 
  SOCKET hListenSocket = socket( AF_INET , SOCK_STREAM , 0 ) ; 
  if ( hListenSocket == INVALID_SOCKET )
  {
    cout << "ERROR: Can't create the socket." << endl ; 
    exit( 1 ) ; 
  }
  cout << "- hListenSocket=" << hListenSocket << endl ; 
 
  // initialize the host address 
  struct hostent* pHostEnt = gethostbyname( pHostAddress ) ;
  if ( pHostEnt == NULL )
  {
    cout << "ERROR: Can't resolve the host name: " << pHostAddress << endl ; 
    exit( 1 ) ; 
  }
  in_addr hostAddress = *((struct in_addr *)pHostEnt->h_addr_list[0]) ;
 
  // bind the socket 
  cout << "Binding the socket." << endl ;
  sockaddr_in addr ;
  addr.sin_family = AF_INET ;
  addr.sin_addr.s_addr = hostAddress.s_addr ;
  addr.sin_port = htons( portNo ) ;
  int rc = bind( hListenSocket , (sockaddr*)&addr , sizeof(addr) ) ; 
  if ( rc != 0 )
  {
    cout << "ERROR: Can't bind the socket ; rc=" << rc << endl ; 
    exit( 1 ) ; 
  }
   
  // start listening on the socket 
  cout << "Listening on the socket..." << endl ;
  rc = listen( hListenSocket , SOMAXCONN ) ;
  if ( rc != 0 )
  {
    cout << "ERROR: Can't listen on the socket ; rc=" << WSAGetLastError() << endl ;
    exit( 1 ) ; 
  }
 
  // create an event that will be flagged when somebody tries to connect 
  WSAEVENT hConnectEvent = WSACreateEvent() ;
  rc = WSAEventSelect( hListenSocket , hConnectEvent , FD_ACCEPT ) ;
  if ( rc != 0 )
  {
    cout << "ERROR: Can't set the connect event ; rc=" << WSAGetLastError() << endl ; 
    exit( 1 ) ; 
  }
 
  // wait for a connection 
  cout << "Waiting for a connection..." << endl ; 
  SOCKET hSocket = WSAAccept( hListenSocket , NULL , NULL , NULL , NULL ) ; 
/***** FAILS HERE! 0 GETS RETURNED *****/
  if ( hSocket == INVALID_SOCKET )                                
  {
    cout << "- Connection pending..." << endl ; 
    WSAEVENT hEvents[1] ;
    hEvents[0] = hConnectEvent ;
    DWORD rc = WSAWaitForMultipleEvents( 1 , hEvents , FALSE , INFINITE , FALSE ) ; 
    if ( rc == WSA_WAIT_EVENT_0 )
    {
      cout << "Connection received." << endl ;
      hSocket = WSAAccept( hListenSocket , NULL , NULL , NULL , NULL ) ; 
      cout << "- hSocket=" << hSocket << endl ; 
      onServerConnection( hSocket ) ; 
    }
  }
  else 
  {
    cout << "- Connection received immediately ; hSocket=" << hSocket << endl ; 
    onServerConnection( hSocket ) ; 
  }